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How to list active / open connections in Oracle?
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Error starting at line 1 in command: select * from FROM v$session Error at Command Line:1 Column:14 Error report: SQL Error: ORA-00903: invalid table name 00903. 00000 - "invalid table name" *Cause: *Action:
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Remove unused imports in Android Studio
I recently started Android Studio IDE to make my android apps. I find shortkey to remove unused import in Android Studio is not working ( Ctrl + Shift + O )
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When to use which design pattern? [closed]
...hem and slowly you'll be able to reconize and figure out when to use them. Start with something simple as the singleton pattern :)
if you want to create one instance of an object and just ONE. You use the singleton pattern. Let's say you're making a program with an options object. You don't want se...
One DbContext per web request… why?
...ion, such as
LINQ to SQL's DataContext, and NHibernate's ISession.
Let start by echoing Ian: Having a single DbContext for the whole application is a Bad Idea. The only situation where this makes sense is when you have a single-threaded application and a database that is solely used by that sing...
Mongoose — Force collection name
...w mongoose pluralizes the collection name, that was confusing when I first started.
– John Morrison
Mar 24 '17 at 17:10
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What does the git index contain EXACTLY?
...ache.h, because the index is a cache for creating commits.
Setup
When we start a test repository with:
git init
echo a > b
git add b
tree --charset=ascii
The .git directory looks like:
.git/objects/
|-- 78
| `-- 981922613b2afb6025042ff6bd878ac1994e85
|-- info
`-- pack
And if we get the ...
What does enctype='multipart/form-data' mean?
...ugging) a library for parsing or generating the raw data, then you need to start worrying about the format. You might also want to know about it for interest's sake.
application/x-www-form-urlencoded is more or less the same as a query string on the end of the URL.
multipart/form-data is signific...
Big-O for Eight Year Olds? [duplicate]
...ant). But if it grows faster, like n2, then you're in trouble; things will start slowing down way too much when you get larger collections. f(n) = n log(n) is a good compromise, usually: your operation can't be so simple as to give linear scaling, but you've managed to cut things down such that it'l...
What should Xcode 6 gitignore file include?
...ther tracking / commenting on something that's clearly badly maintained to start with :) - I simply gave up, and wrote a working .gitignore instead, and shared it on StackOverflow
– Adam
Dec 3 '13 at 12:58
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RSA Public Key format
...C KEY is closer to the content of a PUBLIC KEY, but you need to offset the start of your ASN.1 structure to reflect the fact that PUBLIC KEY also has an indicator saying which type of key it is (see RFC 3447). You can see this using openssl asn1parse and -strparse 19, as described in this answer.
E...